package com.skyworth.utils;

import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
 * Created by skyworth on 2016/7/5.
 */
public class TimeUtil {
	//用来全局控制 上一周，本周，下一周的周数变化
	private int weeks = 0;
	private int MaxDate;//一月最大天数
	private int MaxYear;//一年最大天数

	public static final String DATESUBFIX = " 00:00:00";

	public static void stub() {
		TimeUtil tt = new TimeUtil();

		System.out.println("得到6个月后的日期:" + tt.getAfterMonth(6));
		System.out.println("获取当天日期:" + tt.getNowTime("yyyy-MM-dd"));
		System.out.println("获取本周一日期:" + tt.getMondayOFWeek());
		System.out.println("获取本周日的日期~:" + tt.getCurrentWeekday());
		System.out.println("获取上周一日期:" + tt.getPreviousWeekday());
		System.out.println("获取上周日日期:" + tt.getPreviousWeekSunday());
		System.out.println("获取下周一日期:" + tt.getNextMonday());
		System.out.println("获取下周日日期:" + tt.getNextSunday());
		System.out.println("获得相应周的周六:" + tt.getNowTime("yyyy-MM-dd"));
		System.out.println("获取本月第一天日期:" + tt.getFirstDayOfMonth());
		System.out.println("获取本月最后一天日期:" + tt.getDefaultDay());
		System.out.println("获取上月第一天日期:" + tt.getPreviousMonthFirst());
		System.out.println("获取上月最后一天的日期:" + tt.getPreviousMonthEnd());
		System.out.println("获取下月第一天日期:" + tt.getNextMonthFirst());
		System.out.println("获取下月最后一天日期:" + tt.getNextMonthEnd());
		System.out.println("获取本年的第一天日期:" + tt.getCurrentYearFirst());
		System.out.println("获取本年最后一天日期:" + tt.getCurrentYearEnd());
		System.out.println("获取去年的第一天日期:" + tt.getPreviousYearFirst());
		System.out.println("获取去年的最后一天日期:" + tt.getPreviousYearEnd());
		System.out.println("获取明年第一天日期:" + tt.getNextYearFirst());
		System.out.println("获取明年最后一天日期:" + tt.getNextYearEnd());
		System.out.println("获取本季度第一天到最后一天:" + tt.getThisSeasonTime(11));
		System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:"+TimeUtil.getTwoDay(" 2008 - 12 - 1 "," 2008 - 9 - 29 "));
	}

	/**
	 * 得到指定月后（前）的日期 参数传负数即可
	 */

	public static String getAfterMonth(int month) {
		Calendar c = Calendar.getInstance();//获得一个日历的实例
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Date date = null;
		try {
			date = sdf.parse("2009-11-04");//初始日期
		} catch (Exception e) {

		}
		c.setTime(date);//设置日历时间
		c.add(Calendar.MONTH, month);//在日历的月份上增加6个月
		String strDate = sdf.format(c.getTime());//的到你想要得6个月后的日期
		return strDate;

	}


	/**
	 * 得到二个日期间的间隔天数
	 */
	public static String getTwoDay(String sj1, String sj2) {
		SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
		long day = 0;
		try {
			java.util.Date date = myFormatter.parse(sj1);
			java.util.Date mydate = myFormatter.parse(sj2);
			day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
		} catch (Exception e) {
			return "";
		}
		return day + "";
	}

	/*
	*根据一个日期，返回是星期几
	* 其范围 1~7
	* 1=星期日 7=星期六，其他类推
	 */
	public static int getDayOfWeek(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		int weedIdx = calendar.get(Calendar.DAY_OF_WEEK);
		return weedIdx;
	}

	public  static String afterNDay(int n, String sdate){
		Calendar calendar = Calendar.getInstance();
		Date date = TimeUtil.strToDate(sdate);
		calendar.setTime(date);
		calendar.add(Calendar.DATE, n);

		DateFormat format = new SimpleDateFormat("yyyy-MM-dd 00:00:00");//("yyyy-MM-dd hh:mm:ss");
		String s = format.format(calendar.getTime());
		return s;
	}


	public static String getWednesday(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
/*		calendar.set(Calendar.HOUR_OF_DAY, 0);
		calendar.set(Calendar.MINUTE, 0);
		calendar.set(Calendar.SECOND, 0);*/
		calendar.set(Calendar.DAY_OF_WEEK, Calendar.WEDNESDAY);
		DateFormat format = new SimpleDateFormat("yyyy-MM-dd 00:00:00.000");
		return format.format(calendar.getTime());
	}
	public static String getLastWednesday(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		calendar.set(Calendar.DAY_OF_WEEK, Calendar.WEDNESDAY);
		calendar.add(Calendar.DATE, -7);
		DateFormat format = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
		return format.format(calendar.getTime());
	}

	public static String getWeekOfDay(Date date){
		String[] weekOfDays = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
		Calendar calendar = Calendar.getInstance();
		if(null != date) {
			calendar.setTime(date);
		}
		//// TODO: 2016/7/6 else for exception

		int w = calendar.get(Calendar.DAY_OF_WEEK) - 1;
		if(w < 0) {
			w = 0;
		}
		return weekOfDays[w];
	}

	public static boolean isSameWeekDates(Date date1, Date date2){
		boolean ret = false;
		Calendar calendar1 = Calendar.getInstance();
		Calendar calendar2 = Calendar.getInstance();
		calendar1.setTime(date1);
		calendar2.setTime(date2);

		int subYear = calendar1.get(Calendar.YEAR) - calendar2.get(Calendar.YEAR);
		if(0 == subYear){
			ret = (calendar1.get(Calendar.WEEK_OF_YEAR) == calendar2.get(Calendar.WEEK_OF_YEAR));
		}else if(1==subYear && 11==calendar2.get(Calendar.MONTH)){
			ret = (calendar1.get(Calendar.WEEK_OF_YEAR) == calendar2.get(Calendar.WEEK_OF_YEAR));
		}else if(-1==subYear && 11==calendar1.get(Calendar.MONTH)){
			ret = (calendar1.get(Calendar.WEEK_OF_YEAR) == calendar2.get(Calendar.WEEK_OF_YEAR));
		}
		return ret;
	}

	public void getTimeByDate(){
		Date date = new Date();
		DateFormat df1 = DateFormat.getDateInstance();//日期格式，精确到日
		System.out.println(df1.format(date));
		DateFormat df2 = DateFormat.getDateTimeInstance();//可以精确到时分秒
		System.out.println(df2.format(date));
		DateFormat df3 = DateFormat.getTimeInstance();//只显示出时分秒
		System.out.println(df3.format(date));
		DateFormat df4 = DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.FULL); //显示日期，周，上下午，时间（精确到秒）
		System.out.println(df4.format(date));
		DateFormat df5 = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.LONG); //显示日期,上下午，时间（精确到秒）
		System.out.println(df5.format(date));
		DateFormat df6 = DateFormat.getDateTimeInstance(DateFormat.SHORT,DateFormat.SHORT); //显示日期，上下午,时间（精确到分）
		System.out.println(df6.format(date));
		DateFormat df7 = DateFormat.getDateTimeInstance(DateFormat.MEDIUM,DateFormat.MEDIUM); //显示日期，时间（精确到分）
		System.out.println(df7.format(date));
	}

	public static String getTimeByCalendar(){
		Calendar cal = Calendar.getInstance();
		int year = cal.get(Calendar.YEAR);
		int month=cal.get(Calendar.MONTH);
		int day=cal.get(Calendar.DATE);
		int hour=cal.get(Calendar.HOUR);
		int minute=cal.get(Calendar.MINUTE);
		int second=cal.get(Calendar.SECOND);
		int WeekOfYear = cal.get(Calendar.DAY_OF_WEEK);
		String dateStr = "现在的时间是：公元"+year+"年"+month+"月"+day+"日      "+hour+"时"+minute+"分"+second+"秒       星期"+WeekOfYear;
		System.out.println(dateStr);
		return dateStr;
	}
	/**
	 * 根据一个日期，返回是星期几的字符串
	 */
	public static String getWeek(String sdate) {
		Date date = TimeUtil.strToDate(sdate);
		Calendar c = Calendar.getInstance();
		c.setTime(date);
		return new SimpleDateFormat("EEEE").format(c.getTime());
	}

	/**
	 * 将短时间格式字符串转换为时间 yyyy-MM-dd
	 */
	public static Date strToDate(String strDate) {
		SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
		ParsePosition pos = new ParsePosition(0);
		Date strtodate = formatter.parse(strDate, pos);
		return strtodate;
	}

	public static Date strToDateStart(String strDate) {
		SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
		ParsePosition pos = new ParsePosition(0);
		Date strtodate = formatter.parse(strDate, pos);
		return strtodate;
	}

	public static String dateToStr(Date date) {
		String dateStr = "";
		SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		dateStr = formatter.format(date);
		return dateStr;

	}

	/**
	 * 两个时间之间的天数
	 *
	 * @param date1
	 * @param date2
	 * @return
	 */
	public static long getDays(String date1, String date2) {
		if (date1 == null || date1.equals(""))
			return 0;
		if (date2 == null || date2.equals(""))
			return 0;
// 转换为标准时间
		SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
		java.util.Date date = null;
		java.util.Date mydate = null;
		try {
			date = myFormatter.parse(date1);
			mydate = myFormatter.parse(date2);
		} catch (Exception e) {
		}
		long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
		return day;
	}

	// 计算当月最后一天,返回字符串
	public String getDefaultDay() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar lastDate = Calendar.getInstance();
		lastDate.set(Calendar.DATE, 1);//设为当前月的1 号
		lastDate.add(Calendar.MONTH, 1);//加一个月，变为下月的1 号
		lastDate.add(Calendar.DATE, -1);//减去一天，变为当月最后一天
		str = sdf.format(lastDate.getTime());
		return str;
	}

	// 上月第一天
	public String getPreviousMonthFirst() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar lastDate = Calendar.getInstance();
		lastDate.set(Calendar.DATE, 1);//设为当前月的1 号
		lastDate.add(Calendar.MONTH, -1);//减一个月，变为下月的1 号
//lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天
		str = sdf.format(lastDate.getTime());
		return str;
	}

	//获取当月第一天
	public String getFirstDayOfMonth() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar lastDate = Calendar.getInstance();
		lastDate.set(Calendar.DATE, 1);//设为当前月的1 号
		str = sdf.format(lastDate.getTime());
		return str;
	}

	// 获得本周星期日的日期
	public String getCurrentWeekday() {
		weeks = 0;
		int mondayPlus = this.getMondayPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
		Date monday = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preMonday = df.format(monday);
		return preMonday;
	}

	//获取当天时间
	public String getNowTime(String dateformat) {
		Date now = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat);//可以方便地修改日期格式
		String hehe = dateFormat.format(now);
		return hehe;
	}

	// 获得当前日期与本周日相差的天数
	private int getMondayPlus() {
		Calendar cd = Calendar.getInstance();
// 获得今天是一周的第几天，星期日是第一天，星期二是第二天......
		int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1; //因为按中国礼拜一作为第一天所以这里减1
		if (dayOfWeek == 1) {
			return 0;
		} else {
			return 1 - dayOfWeek;
		}
	}

	//获得本周一的日期
	public String getMondayOFWeek() {
		weeks = 0;
		int mondayPlus = this.getMondayPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, mondayPlus);
		Date monday = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preMonday = df.format(monday);
		return preMonday;
	}

	//获得相应周的周六的日期
	public String getSaturday() {
		int mondayPlus = this.getMondayPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks + 6);
		Date monday = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preMonday = df.format(monday);
		return preMonday;
	}

	// 获得上周星期日的日期
	public String getPreviousWeekSunday() {
		weeks = 0;
		weeks--;
		int mondayPlus = this.getMondayPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, mondayPlus + weeks);
		Date monday = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preMonday = df.format(monday);
		return preMonday;
	}

	// 获得上周星期一的日期
	public String getPreviousWeekday() {
		weeks--;
		int mondayPlus = this.getMondayPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks);
		Date monday = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preMonday = df.format(monday);
		return preMonday;
	}

	// 获得下周星期一的日期
	public String getNextMonday() {
		weeks++;
		int mondayPlus = this.getMondayPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, mondayPlus + 7);
		Date monday = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preMonday = df.format(monday);
		return preMonday;
	}

	// 获得下周星期日的日期
	public String getNextSunday() {
		int mondayPlus = this.getMondayPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 + 6);
		Date monday = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preMonday = df.format(monday);
		return preMonday;
	}

	private int getMonthPlus() {
		Calendar cd = Calendar.getInstance();
		int monthOfNumber = cd.get(Calendar.DAY_OF_MONTH);
		cd.set(Calendar.DATE, 1);//把日期设置为当月第一天
		cd.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
		MaxDate = cd.get(Calendar.DATE);
		if (monthOfNumber == 1) {
			return -MaxDate;
		} else {
			return 1 - monthOfNumber;
		}
	}

	//获得上月最后一天的日期
	public String getPreviousMonthEnd() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar lastDate = Calendar.getInstance();
		lastDate.add(Calendar.MONTH, -1);//减一个月
		lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天
		lastDate.roll(Calendar.DATE, -1);//日期回滚一天，也就是本月最后一天
		str = sdf.format(lastDate.getTime());
		return str;
	}

	//获得下个月第一天的日期
	public String getNextMonthFirst() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar lastDate = Calendar.getInstance();
		lastDate.add(Calendar.MONTH, 1);//减一个月
		lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天
		str = sdf.format(lastDate.getTime());
		return str;
	}

	//获得下个月最后一天的日期
	public String getNextMonthEnd() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar lastDate = Calendar.getInstance();
		lastDate.add(Calendar.MONTH, 1);//加一个月
		lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天
		lastDate.roll(Calendar.DATE, -1);//日期回滚一天，也就是本月最后一天
		str = sdf.format(lastDate.getTime());
		return str;
	}

	//获得明年最后一天的日期
	public String getNextYearEnd() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar lastDate = Calendar.getInstance();
		lastDate.add(Calendar.YEAR, 1);//加一个年
		lastDate.set(Calendar.DAY_OF_YEAR, 1);
		lastDate.roll(Calendar.DAY_OF_YEAR, -1);
		str = sdf.format(lastDate.getTime());
		return str;
	}

	//获得明年第一天的日期
	public String getNextYearFirst() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar lastDate = Calendar.getInstance();
		lastDate.add(Calendar.YEAR, 1);//加一个年
		lastDate.set(Calendar.DAY_OF_YEAR, 1);
		str = sdf.format(lastDate.getTime());
		return str;
	}

	//获得本年有多少天
	private int getMaxYear() {
		Calendar cd = Calendar.getInstance();
		cd.set(Calendar.DAY_OF_YEAR, 1);//把日期设为当年第一天
		cd.roll(Calendar.DAY_OF_YEAR, -1);//把日期回滚一天。
		int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
		return MaxYear;
	}

	private int getYearPlus() {
		Calendar cd = Calendar.getInstance();
		int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);//获得当天是一年中的第几天
		cd.set(Calendar.DAY_OF_YEAR, 1);//把日期设为当年第一天
		cd.roll(Calendar.DAY_OF_YEAR, -1);//把日期回滚一天。
		int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
		if (yearOfNumber == 1) {
			return -MaxYear;
		} else {
			return 1 - yearOfNumber;
		}
	}

	//获得本年第一天的日期
	public String getCurrentYearFirst() {
		int yearPlus = this.getYearPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, yearPlus);
		Date yearDay = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preYearDay = df.format(yearDay);
		return preYearDay;
	}

	//获得本年最后一天的日期 *
	public String getCurrentYearEnd() {
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");//可以方便地修改日期格式
		String years = dateFormat.format(date);
		return years + "-12-31";
	}

	//获得上年第一天的日期 *
	public String getPreviousYearFirst() {
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");//可以方便地修改日期格式
		String years = dateFormat.format(date);
		int years_value = Integer.parseInt
				(years);
		years_value--;
		return years_value + "-1-1";
	}

	//获得上年最后一天的日期
	public String getPreviousYearEnd() {
		weeks--;
		int yearPlus = this.getYearPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, yearPlus + MaxYear * weeks + (MaxYear - 1));
		Date yearDay = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preYearDay = df.format(yearDay);
		getThisSeasonTime(11);
		return preYearDay;
	}

	//获得本季度
	public String getThisSeasonTime(int month) {
		int array[][] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}, {10, 11, 12}};
		int season = 1;
		if (month >= 1 && month <= 3) {
			season = 1;
		}
		if (month >= 4 && month <= 6) {
			season = 2;
		}
		if (month >= 7 && month <= 9) {
			season = 3;
		}
		if (month >= 10 && month <= 12) {
			season = 4;
		}
		int start_month = array[season - 1][0];
		int end_month = array[season - 1][2];
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");
		String years = dateFormat.format(date);
		int years_value = Integer.parseInt(years);
		int start_days = 1;//years+"-"+String.valueOf(start_month)+"-1 ";//getLastDayOfMonth(years_value,start_month);
		int end_days = getLastDayOfMonth(years_value, end_month);
		String seasonDate =
				years_value + "-" + start_month + "-" + start_days + ";" + years_value + "-" + end_month + "-" + end_days;
		return seasonDate;
	}

	/**
	 * 获取某年某月的最后一天
	 *
	 * @param year  年
	 * @param month 月
	 * @return 最后一天
	 */
	private int getLastDayOfMonth(int year, int month) {
		if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8
				|| month == 10 || month == 12) {
			return 31;
		}
		if (month == 4 || month == 6 || month == 9 || month == 11) {
			return 30;
		}
		if (month == 2) {
			if (isLeapYear(year)) {
				return 29;
			} else {
				return 28;
			}
		}
		return 0;
	}


	/**
	 * 是否闰年
	 *
	 * @param year 年
	 * @return
	 */
	public boolean isLeapYear(int year) {
		return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
	}

	public static String getNowDateFormat(String formatStr) {
		SimpleDateFormat sdf = new SimpleDateFormat(formatStr);
		return sdf.format(new Date());
	}
}
